Also see this site's other Business IndexLinux.com
List of Linux Interactive TV Businesses
To find out more about an entity's involvement with interactive television, type both their name and "interactive television" in a search engine.
Linux Redhat Interactive
TV Linux Alliance was a consortium of technology suppliers to cable, satellite and telecommunication network operators who wished to support the deployment of Linux-based digital set-top terminals capable of interactive television applications and services.
Linux Media Center
Also see the site's large Media Center webpage.
XBMC Media Center